Valve-gearing.



No, 880,402. PATENTED JULY 16, 1907. v J. F. MBYJES.

VALVE GEARING.

APILIUATION FILED PEBJB. 1907.

2 SHEETS-SHEET 1- zz zzea sea jam/162102) zus mum's PEYERS co, wnsymarou, n. c.

PATENTED JULY 16, 1907.

J. F. MEYJES.

VALVE GBARING.

APPLICATION FILED mums, 1907.

2 SHEETS-SHEET Z.

THE umzms PETERS co, wisnmamn, a. c.

J'OI-IANNES FRANZISOUS MEYJES, OF ZWEIBRUOKEN, GERMANY.

VALVE-GE ARING.

Specification of Letters Patent.

Patented July 16, 1907.

Anolication filed February 16,1907. Serial No. 357,711.

To all whom it may concern:

Be it known that I, JoHANNns FRANZISCUS MnYJns, a subject of the King of Bavaria, residing at Zweibriicken, ,Pfalz, Bavaria, Germany, have invented certain new and useful Improvements in Reversible Variable-Expansion Valve-Gearing, of which the following is a specification.

This invention relates to reversible valve-gearing and has for its object to obtain any desired variation in the admission or cut-off independently of the release or exhaust during running of the engine.

The ordinary valve-gears in which slide-valves are employed, with early cut-off, give too much compression or cushioning and a too early release or exhaust. It is therefore advantageous to keep the beginning and end of the exhaust constant and, at the same time, in controlling the admission or cut-off, to provide for variations in the load by making corresponding alterations in the admission or cut-off during running. Valve-gears are already known, in which this problem is solved by means of two slide-valves. The present invention provides a new solution of this problem. The reversing lever remains, whereby a motion-block, from which the admission or cut-off is controlled, is moved in a slotted link and the exhaust-eccentric is turned on the shaft, during running, into its end position, so that the compression or cushioning and the release or exhaust thus remain constant. The point at which cut-off takes place or the time during which steam is admitted to the cylinder is however adjusted by turning.the two admission-eccentrics without moving the motion-block. The turning 'of the two latter eccentrics isefiected by a separate lever or by a governor. When this motion is not provided, the engine can be immediately controlled by the said reversing lever alone, even during running.

In the drawingsFigure 1 is an end view of the invention; and Fig. is a side view thereof.

For this purpose, there is mounted on the side or countershaft'w, in addition to an eccentric a which drives the exhaust-valve directly, two eccentrics b and c, the straps of which are pivotally connected to a slotted link carried by a rocking lever d. To the adjustable motion-block s of this slotted link is pivotally attached the rod e of the admission-valve E. Said eccentrics a, b and c oscillate about fixed points or pivotpins f, g and h respectively which are arranged on arms a and a mounted on the shaft 10 so as to turn therewith and projecting in opposite directions therefrom. The position and throw of the eccentric a are controlled by means of a sleeve 1, which is rotatable on the shaft to and which has an arm coupled by a connecting rod to said eccentric. The position and throw of the eccentrics b, c are controlled by means of a sleeve 70 which extends through the said eccentrics and has two lever-like arms Z and m, to which the eccentrics are coupled by means of short connectingrods 11 and 0. The shalt 10 receives its motion from an engine suitably connected therewith. If new the reversing lever be moved out of the position 1) for example, into the position 1", the rectilinear motion oi the sleeve 1' is converted by means oi screw threads into a rotary motion, and thereby the exhaust eccentric a is brought from the forward position 1) into the backward position r or into any desired intermediate position (Fig. 3). At the same time, however, the motion-block s, which is positively connected to the reversing lever in any suitable manner (in the present case by means of the lover a and connecting rods 2), and thus also the admission-valve E, are brought from the position corresponding to forward motion to that corresponding to backward motion, together with the sleeve 2'. Then by turning the sleeve k, during running, by means of a hand lever or by means of the governor, the two admission-eccentrics b and c can be turned in opposite directions relatively to each other so that their centers are brought, for example, from the positions p, (1 into the positions t, u, these motions taking place quite independently of the motion of the reversing lever and its connected parts above mentioned. The motion-block 5 thus receives a short travelwith large angles of advance and thereby controls the admission or cut-off, if e. the time during which steam or other working fluid is admitted to the cylinder.

What I claim is:-

1. Reversible valve-gearing [or fluid-pressure engines, comprising a countersnai't, an exhausteceentric on said counterslmft, means for turning said eccentric relatively to said counterslinlt, an exhaust valve actuated by said eccentric, two admission-ecccntrics on said countershaft, means for turning said eccentrics relatively to said coun tershaft, a link driven by said admission-eccentrics, a motion-block carried by said link, an admission-valve actuated by said motion-block, and means i'or simultaneously adjusting said exhaust-eccentric and said motionblock.

2. Reversible valve-gearing for iluid-pressure engines, comprising a sidcor counter-shaft, an exhaust-eccentric pivotally mounted on said countersliaft at a point eccentric to said shaft and to said eccentric, a sleeve rotatably mounted on said counter-shaft, a coupling between said sleeve and said eccentric, a sleeve axially movable on said shaft, screw-threads connecting said rotatable sleeve and said axially-movable sleeve, a hnndlever rotntably colinected to said axially-movable sleeve, two admission-eccentrics pivotally mounted on said shaft at points cccentric to said shaft and to said eccentrics, a second sleeve rotatably mounted on said countershal't, couplings between said second rotatably mounted sleeve and said ndmissioir eccentrics, a link driven by said admission-eccentrics, :1 motion-block carried by said link, an admission-valve actuated by said motion-block, and gearing connecting said motion-block and said hand-lover.

Reversible valve-gearing for iluidprcssure engines, comprising a counterslnii't, an c.\'l1:uisteccentric pivotally mounted on said countcrslmit, :1 sleeve rotaiinbly mounted tries, a motion-block carried by said link, an admission- 10 valve actuated by said motion-block, and gearing connecting said n1otionblock and said hand-lever.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHANNES FRANZISCUS MEYJES. \Vitnesses Gnome GROSSHAUS, LUITPOLD QUELL. 

